Forming-machine.



Fjgl J. F. COSTA.

FORMING MACHINE. APPLICATION FILED 1123.17, 1911.

1,004,852. Patented 001;.3, 1911.

4 SHEETS-SHEET 1.

Wnesses/ Int/611115011 J; F. COSTA.

FORMING MACHINE.

APPLICATION FILED APR.17,1911.

Patented Oct. 3, 1911.

4 SHEETS-SHEET 2.

Patented Oct. 3, 1911.

4 SHEETS-SHEET s.

J. F. COSTA.

' FORMING MAGHINB.

APPLICATION FILED APB. 17,/1 911.

Patented Oct. 3; 1911.

4 SHEETS-SHEET 4.

W1 essesx COLUMBIA PLANOGRAPH C(Lv WASHINGTON, n. c.

JOHN F. COSTA, OF CENTERVILLE, CALIFORNIA.

FORMING-MACHINE.

Specification of Letters Patent.

Patented Oct. 3, 1911.

Application filed April 17, 1911. Serial No. 621,677.

To all whom it may concern:

Be it lmown that I, JOHN F. OosTA, citizen of the United States,residing at Centerville, in the county of Alameda and State ofCalifornia, have invented new and useful Improvements .in Forming-Machines, of which the following is a specification.

This invention relates to a machine for forming sheet metal blanks andparticularly pertains to a mechanism for manufacturing baking-pans.

It is the object of this invention to provide a machine for formingmetal blanks into baking pans and which machine is especially adaptedfor manufacturing the baking pan on which Letters Patent #937,4241, wereissued to me under date of October 19, 1909.

A further object is to provide a machine of the above character and forthe above purpose which is simple in construction and operation andwhich is rapid in its output.

Other objects will become apparent here inafter.

The invention consists of the parts and the combination and constructionof parts hereinafter more fully described and claimed, having referenceto the accompanying drawings, in which Figure 1 is a front elevation ofthe invention. Fig. 2 is a side elevation of same. Fig. 3 is a detailplan view of the upper end of the machine. Fig. 1 is a detail plan viewon the line ww of Fig. 1. Fig. 5 is a detail in section, partly inelevation of the mechanism for forming the ends of the pan. Fig. 6 is adetail in elevation of the mechanism for forming the sides of the pan inthe open position. Fig. 7 is a similar view in the closed position. Fig.8 is a detail in section of the end of the pan as formed by themechanism shown in Fig. 5. Fig. 9 is a detail in section of thepartition formed in the pan by the mechanism shown in Figs. 6 and 7.Fig. 10 is a plan view on the line 3 Fig. 6, showing the blank indiagram as positioned prior to folding. Fig. 11 is a perspective view ofthe pan formed by mechanisms illustrated in Figs. 6 and 7 In thedrawings A represents the frame of the machine and B is a horizontallydisposed drive shaft revolubly mounted there on, which shaft may berotated in any suitable manner through a pulley C and is connected withthe several operative parts of the machine, as will be later described.

Mounted on each end of the shaft B eX- terior of the frame A is agrooved cam 2, each of which cams 2 engages a roller 3 on a rocking arm4 pivoted on the outer end of a shaft 5, mounted on the frame A; thecams 2 being so constructed as to oscillate the rocking arms 4irregularly. The outer end of each of the rocking arms 4 is pivotallyattached to the lower end of a vertically disposed connecting rod 6which eX- tends upward alongside the frame A and is pivoted at its upperend to a guide block 7 formed on the side members 8 of a crossheadframe, which cross-head is designed to be reciprocated by theoscillation of the rocking arms 4.

The side members 8 of the cross-head are slidable in verticalguides onthe frame A and are connected together at their ends by means ofhorizontallydisposed parallel bars 99. Slidably mounted on each of thebars 99 is a pair of sleeves 1010; the sleeves 10 on the lower bar 9being connected with the sleeves 10 on the upper bar 9 by means ofvertically disposed rods 11, which rods are provided to prevent thesleeves 10 from turning on the bar 9. A similar pair of sleeves 12-12are rigidly mounted on the bars 99 centrally of the length thereof,which are connected together by means of a rod 11. The lower ends of therods 1111' extend below the sleeves 10-12 on the bar 9 and each has atemplet or die 13 mounted thereon, which templets or dies are coplanarin relation to each other and conform in shape to the interior of thepan sections, namely, having inwardly sloping or tapered sides.

The dies 13 are designed to be advanced toward and retracted fromcorresponding shoes 14 mounted on a bed-plate 14 on the frame A, by themovement of the crosshead frame 8, and are designed to rest upon a sheetmetal blank D previously placed on the shoes 14, as shown in Figs. 6 and10, and as later described.

The central shoe 14 is rigidly mounted on the plate 14, while theoutermost shoes 14 are slidable thereon; these outermost shoes 14 beingadapted to be advanced toward and retracted from the central shoe 14 aswill be later described, the several shoes 14 being disposed in coplanarrelation to each other.

Pivotally mounted on the shaft 5 near its outer ends is a pair ofhorizontally disposed levers 15 which extend beneath a counter-shaft E,and are pivotally attached to the lower ends of vertically disposed connecting rods 16, each of which rods terminates in a yoke at its upperend in which a pair of oppositely extending links 17 are mounted, asshown in Fig. 5; the levers 15 being adapted to be rocked downward bycams F on the counter-shaft E and upward by a counter-weight, as laterdescribed. The links 17 are connected at their outer ends to levers 18which are fulcrumed on horizontally disposed parallel shafts 19 situatedadjacent the outer longitudinal edges of the shoes 14.

Rigidly mounted on the outer ends of the levers 18 on each shaft 19, isa bar 20, shown in Fig. 10, which is designed to be given an upward andinward movement by the rocking of the levers 18 for the purpose offolding projections a on the blankD against the ends of dies 13 to formthe ends of the pan, as later described.

Pivotally mounted on the shaft 5 midway of its length, is a horizontallydisposed lever 21, particularly shown in Fig. 4, which extends beneaththe drive shaft B and is pivotally connected at its outer end to across-head 22. Vertically extending connecting rods 1'? are pivotallyattached at their lower ends to the outer ends of the cross-head 22,which connecting rods are pivoted at their upper ends to cranks 23 on apair of )arallel shafts 24, as shown in Figs. 6 and I. Mounted on eachshaft 24 adjacent its ends is a pair of cam-levers 25 which levers aredisposed beneath a forming plate 26 pivotally mounted on the ends of theoutermost shoes 14, as shown in Figs. 6 and 7, which plates 26 extendthe length of the shoes and are designed to be given an upward andinward movement by the rocking of the cam levers 25, as laterclescribed, for the purpose of folding the ends of the blank D againstthe outer side of the outermost dies 13 to form the sides of the pan,and at the same time move the outer most dies toward the center die.

Pivotally mounted on each side of the central die 13 are plates 27 whichare hingedly connected attheir outer ends to similar plates 27 mountedon the inner side of the outermost dies 13. These plates 2727 aredesigned to move upward and inward toward the respective shoes on whichthey are mounted, as indicated by the arrows Z, when the outer dies 13are moved toward the center die, as before mentioned, so as to press theblank D upward to form a pair of parallel partitions in the pan, asshown at p, Fig. 11.

The levers 18 and cam-levers 25 are normally retained in their lowermostpositions by means of counter-weights 28 mounted on levers 29, fulcrumedon a shaft 30, the inner ends of which levers are pivotally attached tothe upper ends of connecting rods 31, the lower ends of which rods areattached to the outer ends of the levers 15 and the cross-head 22, asshown in Fig. 1.

The outermost dies 13 are designed to be restored to their normalpositions, after being advanced toward the central die 13 by the actionof the cam-levers 25, by means of a pair of bell-crank levers 3232,mounted on the bar 11, the long arms of which are connected by links3333 to the sleeves 10 on which the dies 13 are mounted. Thesebell-crank levers 3232 are actuated by means of stationary abutmentrollers 3434 mounted on a head bar on the frame A, which rollers engageand bear upon the short arms of the bell-crank levers 32-32 when thelatter are moved upward with the bar 11 on the cross-head 8, so as tocause the sleeves 10 to slide outward on the bar 9 away from the centersleeve 12.

The various working parts of the machine are normally positioned inrelation to each other as shown in Fig. 1, prior to the pan formingoperation. In this position the cross-head carrying the dies 13' is inits uppermost position; the outer dies 13 are in their outermostposition above the outermost shoes 14; and the end forming, sideforming, and partition forming plates 2026 and 2727, respectively, arein their lowermost positions. A peculiarly shaped sheet metal blank D isthen placed on the shoes 14 beneath the dies 13, as shown in Figs. 56and 10, whereupon the machine is set in motion by rotating the pulley C.This causes the shaft B with the cam disks 2 and a cam G (Fig. 4)thereon, to revolve, the cams 2 moving the levers 4 downward which pullson the connecting rods 6 and thereby causes the cross-head 8 to movedownward to position the dies 13 and the blank D, as shown in Fig. 6.The cams 2 are so shaped as to retain the dies 13 in their lowermostposition for some time, during which time the counter-shaft E is rotatedby a geared connection with the shaft B so as to cause the cams F tobear down upon the levers 15 and thereby cause the rods 16 to movedownward, which movement rocks the levers 18 and causes the end formingplates 20 to move upwardly and inwardly so as to fold the projections aon the blank D against the ends of the dies 13; ribs 20 on the plates 20folding the edges of the projections a around the corners of the dies 13to form inwardly projecting flanges 0 on the sides of the end folds a ofthe pan, as shown in Fig. 11. The projections a are of such length thatwhen folded against the dies 13, a flange 13 on the upper edge of thedie will cause the upper edge of the end fold to bend outwardly over theupper edge of the plates 20 to form a horizontally extending flange (Z,as shown in Figs. 8 and 11. This being done the plates 20 are retractedby means of the counter-Weights 28 connected thereto, the cams F movingout of their operative position to admit the levers 15 to return tonormal, whereupon the cam G on the shaft B engages the lever 21 so as torock the latter in a downward direction and thereby cause the rods 17 torock the'cam-levers 25 upwardly and inwardly, which movement istransmitted to the plates 26 so as to cause the ends of the blank D tofold against the outer faces of the dies 13 to form the sides 6 of thepan; ribs 26 on the plates 26 folding the edge of the sides 6 around thepreviously folded ends a as shown at f in Fig. 10, and flanges 13 on thedies 13 turning the outer edges of the sides 0 to form flanges g on theupper edges thereof. Continued movement of the camlevers 25, causes theoutermost dies 13 to move inwardly toward the central die 13 as shown inFig. 7, which causes the plates 27-27 to move upwardly and therebydouble the blank D into the shape shown in Fig. 9 by which actionthepartitions b are formed; ribs on the outer edges of the plates 27-27folding projections on the edge of the blank D around the ends of thecentral end section a as shown at h in Fig. 11. The foregoing beingaccomplished, the die-carrying cross-head is moved upward to withdrawthe dies 13 from the now finished pan, which is removed from the machineby lifting it upward a short distance and withdrawing it from under theelevated dies 13. The outermost dies 13 on reaching their uppermostlimits of travel are retracted as before described, by the action of thebellcrank levers 32-32, and the outermost shoes 1a are caused to assumetheir normal position as soon as the pan is removed b the spreadingaction of the hinged plates 27-27, the weight of these plates bearingagainst the movable shoes to move them away from the stationary shoe;the camlevers 25 of course having previously been restored to theirnormal position by the action of the counter-weight 28 connectedtherewith through the rod 31 and crosshead 22.

Having thus described my invention, what I claim and desire to secure byLetters Patent is 1. The combination of a plurality of shoessubstantially in one plane and a corresponding series of substantiallycoplanar dies, partition-forming links pivoted to the shoes, outer wallforming links, and means to simultaneously move the dies toward theshoes and to move the shoes toward each other and the dies toward eachother.

2. In a pan making machine, a fixed shoe, a pair of movable flankingshoes, corresponding fixed and movable dies, forming devices between theshoes and dies, and means for operating the dies and forming devices tofold a single sheet simultaneously about the several dies.

3. In a pan making machine, a fixed shoe, a pair of movable flankingshoes, corresponding fixed and movable dies, forming devices between theshoes and dies, and means for operating the dies and forming devices tofold a single sheet simultaneously about the several dies, said shoesconstructed and arranged so as to maintain their top surfaces always inthe same planes 4:. In a sheet metal forming machine, the combination ofa plurality of spaced dies, a cross-head on which said dies are mounted,means for intermittently reciprocating said cross-head and'dies in avertical direction, a plurality of shoes corresponding to said dies,said means adapted to hold said dies momentarily in contact with theupper surface of a sheet metal blank on said shoes, and means forbending the sides and ends of the blank around the ends and sides ofsaid dies.

5. In a sheet metal forming machine, the combination of a plurality ofspaced dies, a cross-head on which said dies are mounted. means forintermittently reciprocating said crosshead and dies in a verticaldirection, a plurality of shoes corresponding to said dies, said meansadapted to hold said dies momentarily in contact with the upper surfaceof a sheet metal blank on said shoes, means for bending the sides andends of the blank around the ends and sides of said dies, and means foradvancing and retracting the outermost shoes and dies in a horizontaldirection.

6. In a sheet metal forming machine, the combination of a plurality ofspaced, reciprocating dies, shoes corresponding to said dies, means formomentarily holding said dies on a sheet metal blank, means for bendingprojections on the edge of the blank around the ends of said dies,separate means for bending the ends of the blank around the sides of theoutermost dies, and means for advancing the outermost shoes and dies inunison toward each other, and means by which the advancing movement ofthe shoes will form raised folds in the blank.

7. In a sheet-metal forming machine, the combination of a plurality ofspaced, reciprocating dies, shoes corresponding to said dies, means formomentarily holding said dies on a sheetanetal blank, means for bendingprojections on the edge of the blank around the ends of said dies,separate means for bending the ends of the blank around the sides of theoutermost dies, means for advancing the outermost shoes and dies inunison toward each other, means by which the advancing movement of theshoes will form raised folds in the blank, means for reciprocating saiddies, and means by which the upward movement of said dies will cause theoutermost dies to retract from each other.

8. In a sheet-metal forming machine, the combination of a plurality ofspaced, reciprocating dies, shoes corresponding to said dies, means formomentarily holding said dies on a sheet-metal blank, means for bendingprojections on the edge of the blank around the ends of said dies,separate means for bending the ends of the blank around the sides of theoutermost dies, means for advancing the outermost shoes and dies inunison toward each other, means by which the advancing movement of theshoes will form raised folds in the blank, means for reciprocating saiddies, means by which the upward movement of said dies will cause theoutermost dies to retract from each other, and means for retracting theblankbending means from the formed article.

9. In a pan-making machine, the combination with a fixed shoe and avertically reciprocating die corresponding thereto, of a pair offlanking movable shoes on opposite sides of the fixed shoe in coplanarrelation therewith, a corresponding pair of horizontally and verticallymovable dies flanking the die over the fixed shoe, means for advancingand retracting said dies to and from said shoes, and mechanism foradvancing the flanking shoes and dies toward each other when the diesare in their lowermost position.

10. In a pan making machine, the combination with a fixed shoe and avertically reciprocating die corresponding thereto, oi a pair offlanking movable shoes on opposite sides of the fixed shoe in coplanarrelation therewith, a corresponding pair of horizontally and verticallymovable dies flanking the die over the fixed shoe, means for advancingand retracting said dies to and from said shoes, mechanism for advancingthe flanking shoes and dies toward each other when the dies are in theirlowermost position, and linked connections between the fixed shoe andthe flanking shoes adapted to move upward as the flanking shoes moveinwardly, to fold a sheet metal blank against the sides of the fixed dieand the inside of each flanking die.

11. In a pan making machine, the combination with a fixed shoe and avertically reciprocating die corresponding thereto, of a pair offlanking movable shoes on opposite sides of the fixed shoe in coplanarrelation therewith, a corresponding pair of horizontally and verticallymovable dies flanking the die over the fixed shoe, means for advancingand retracting said dies to and from said shoes, mechanism for advancingthe flanking shoes and dies toward each other when the dies are in theirlowermost position, linked connections between the fixed shoe and theflanking shoes adapted to move upward as the flanking shoes moveinwardly, to fold a sheet-metal blank against the sides of the fixed dieand the inside of each flanking shoe, and means operated by the shoeadvancing mechanism for folding the blank against the outer side of eachflanking die.

12. In a pan making machine, the combination with a fixed shoe and avertically reciprocating die corresponding thereto, of a pair offlanking movable shoes on opposite sides of the fixed shoe in coplanarrelation therewith, a corresponding pair of horizontally and verticallymovable dies flanking the die over the fixed shoe, means foradvancingand retracting said dies to and from said shoes, mechanism for advancingthe flanking shoes and dies toward each other when the dies are in theirlowermost position, linked connections between the fixed shoe and theflanking shoes adapted to move upward as the flanking shoes moveinwardly, to fold a sheet metal blank against the sides of the fixed dieand the inside of each flanking shoe, means operated by the shoeadvancing mechanism for folding the blank against the outer side of eachflanking die, and means for folding portions of the blank against theends of the dies before the flanking dies are advanced.

13. In a pan making machine, the combi nation with a fixed shoe and avertically reciprocating die corresponding thereto, of a pair offlanking movable shoes on opposite sides of the fixed shoe in coplanarrelation therewith, a corresponding pair of horizontally and verticallymovable dies flanking the die over the fixed shoe, means for ad vancingand retracting said dies to and from said shoes, mechanism for advancingthe flanking shoes and dies toward each other when the dies are in theirlowermost position, linked connections between the fixed shoe and theflanking shoes adapted to move upward as the flanking shoes moveinwardly, to fold a sheet metal blank against the sides of the fixed dieand theinside of each flanking shoe, means operated by theshoe-advancing mechanism for folding the blank against the outer side ofeach flanking die, means for folding portions of the blank against theends of the dies before the flanking dies are advanced, and means forretracting the flanking dies as they are moved upward from the shoes,

and separate means for retracting the flank- 10 ing shoes after theformed pan is removed. In testimony whereof I have hereunto set my handin the presence of two subscribing Copies of this patent may be obtainedfor five cents each, by addressing the Commissioner of Patents,Washington, D. G.

